Rigorous determination of stratospheric water vapor trends from MIPAS observations

Year: 2011

Authors: Ceccherini S., Carli B., Raspollini P., Ridolfi M.

Autors Affiliation: CNR, Ist Fis Appl Nello Carrara, I-50019 Sesto Fiorentino, Italy
Univ Bologna, Dipartimento Fis, I-40127 Bologna, Italy

Abstract: The trend of stratospheric water vapor as a function of latitude is estimated by the MIPAS measurements by means of a new method that uses the measurement space solution. The method uses all the information provided by the observations avoiding the artifacts introduced by the a priori information and by the interpolation to different vertical grids. The analysis provides very precise values of the trends that, however, are limited by a relatively large systematic error induced by the radiometric calibration error of the instrument. The results show in the five years from 2005 to 2009 a dependence on latitude of the stratospheric ( from 37 to 53 km) water vapor trend with a positive value of (0.41 +/- 0.16)% yr(-1) in the northern hemisphere and less than 0.16% yr(-1) in the southern hemisphere. (C) 2011 OSA

Journal/Review: OPTICS EXPRESS

Volume: 19 (10)      Pages from: A340  to: A360

More Information: The study was conducted as part of the CTOTUS project that is supported by the POR programme of the Tuscany Region within the CReO/FESR objectives 2007-2013. The forward and inverse models used in this work have been optimized and tested in the frame of the project Support to MIPAS Level 2 product validation under ESA-ESRIN contract N. 21719/08/I-OL.
KeyWords: TROPICAL TROPOPAUSE; RETRIEVAL; VARIABILITY; BOULDER; SERIES
DOI: 10.1364/OE.19.00A340

ImpactFactor: 3.587
Citations: 3
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